DIY, change the master window switch on your Chevrolet Silverado LT, the model produced in 2015. You will need a 7 mm socket wrench and a new module switch from your auto parts store. You can do this repair fairly easy, in about 15 minutes.
In the beginning, open the door of your car and go to the master window switch. The first thing you want to do is to remove the plastic panel shown in the image below.
Pull it out firmly and you will uncover four 7 mm bolts that actually hold the window switch, as shown below. Remove them using the wrench and pull out the assembly.
After you do it, you will notice three electrical harnesses that power up the switch panel, shown below. Unplug the one marked with the red arrow and then separate the module from the plastic cover. You can do it very easily using your fingers or a small flat blade screwdriver, if you find it easier.
After you do this, you can install the new module. Pop it back into the plastic cover, connect the electrical harness, install the whole assembly back into the door panel and secure it with the four bolts. In the end reinstall the plastic cover and you are done. This is all you need to do, if you wish to change the master window switch on your Chevrolet Silverado LT, manufactured in 2015.